Gurobi 5.0.1 (linux64) logging started Sat Nov 17 01:23:54 2012 Optimize a model with 50267 rows, 45582 columns and 195319 nonzeros Presolve removed 1304 rows and 5114 columns Presolve time: 1.29s Presolved: 48963 rows, 40468 columns, 186552 nonzeros Variable types: 0 continuous, 40468 integer (40468 binary) Found heuristic solution: objective 213.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 326 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 infeasible 0 3.00000 2.00000 33.3% - 1s Explored 0 nodes (326 simplex iterations) in 1.44 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%